Key controlled padlock



L. M. DYSON KEY CONTROLLED PADLOCK Nov. 29, 1949 2 Sheets-Sheet 1 Filed Sept. 22, 1945 :INVENTOR BY (/ATT! )RNEY.

Nov. 29, 1949 I M, DYSON 2,489,484

' KEY CONTROLLED PADLOCK Fifed Sept. 22, 1945' 2 Sheets-Sheet 2 INVENTOR v Patented Nov. 29, 1949 lTEiD IiPAT-ELNT OFFICE TKEY CONTROLLEDPADLOCK Louis" M. Dyson, New Britain, Gonn Beatrice N. Dyson administratrix of said Louis M. Dyson,

Fdeceased,rassignor'io The American "Hardware -1Corporat1on,iNew Britain, Conn, a corporation of- Connecticut Application September 22, *1945,"Serial No. 617,953

6 Claims. 1

invention, "while particularly adapted 'for use :in -a padlock, may ice-embodied in various forms of looks, but by'reason or itsadaptab'ility -=to apadlo'ck such arstructure is shown forthe .ipurpose ofrdis'closing -tl'reinvention herein.

An object of the invention, among others, the production of a lock comprising a unit in -wlii'chsmuc h of the locking mechanism is contained ;and which:m'ay be, by the use of a proper key, removed 'from' the'l'ock body as a. whole for much purpose .as may be desired.

.One :form :of a padlock embodying the inveniti'on and in "the construction and use of which stheiobjectslherein set out, as well as others, may be attained is illustrated in the .:accompanying v:rirawing, :in Wh'ichfigure lzis an elevational side view of a lock :enibodyingsny invention.

FigureLtZLiS an elevationeil edge v-iewoi'the same. 'Figure 1-3 is an .end view showing the removable .Figure 4 view-in section,-on enlarged scale,

through fiche lock lengthwise thereof and show-- ii-n'gi'some :of :the .parts in elevation.

,JFigure dis :a view in cross section'on a less endarged scale and, on a plane denoted by the "zbrokenfline 'A-Ao'f Fig. '4.

:Figurefizis a similar'view on a plane denoted by the dotted "line B-B of Fig. 4.

Figure? is another similar view on a "plane denoted :by the plotted line C-C of Fig. 4.

iEigure 8 is a perspective view-of a portion of the :unitsillustrating :it in side elevation.

Figure '9 is a similar view of the upper end of the unit'but looking from apoint I at 'right angles to the point v:of view-"oi F'ig. 8.

.Figure '10 :is a view in cross section through the. unit illustrating the parts "in position 'with the 016 :key placed for removal of the unit.

Figure .11 "assimilar view but showing the service key turned into position to throw the bolts to release ithe :shackle.

- :Figure :l2'sis a'view'iin. section'throughthe lower partxof theunit showing the service keyininitial positionto .thrnwathe bOItS tOIQIEaSB the-shackles; -Eignre 13 a similar vliew but showing the core key ready to be' turned into position "to-'cam up :the:floating".pin' tozrelease the unit.

Figure 14 is a side view of the thiirilole forming the seat .fforithe =l-lower end of the shackle spring.

.Eigure 15 is :a similar view looking from a point -at .right angles to :the point *of view of Ri i4.

.inf the-accompanying drawings the :numeral ill :denotes'the body or i'shellidf ailofik that is, as 'hereinbefore mentioned, in :theform of a'padlock, this'bo'dy having a hole '.comprising .a Wei-l H on one side to receive the long 16g 112 :of ".the shackle and an opening 13 on the opposite side or edge of thes'hell atoneeridthereofzto receive Locking notches l8-- l9 are formed :in the ing bolts 3il4ll to be hereinafter fullydescribe'd. The structure as -to'the' -main part-oi the'unit is of a character sim'i-lar to "that illustrated and described in my-co-pendingapplication of Serial Number 580,384, filediMarch 1, 1945,which resuited inPatent No. 2481993, issued -Sep't. 6, 1949, this beinga companion case and drawn to details comprising divisional matter as to the means for engaging the locking zbolt :unit for retaining it in place, and reference is hereby made to said :co-pending application for such "understanding as may-be further required.

The body l-ll is bored irom the-bottom to create a recess 21 extending 'inwardly from one end nearly to the opposite or top end' -ofthe case to receive an insert un-i't -22 in' whic'his contained much of the mechanism of'the lock such as the key plug, bolt, bolt-spring, pin tumblers, drivers, master pins, tumbler springs, master ring, retaining cam, and otherparta alll of these parts being well known to those 'skilled' inthe artand requiring no further and detailed description herein, except as will be hereinafter specifically mentioned. This recess conforms somewhat to the shape of a figure-"8 incross section and comprises a key plug chamber "23 and 'a somewhat smaller tumbler chamber 2ll to receive similar parts 2'526 specificallyof the insert-unit '22.

This insert'un'it --'comprises 'the partifi which is infact a bodyior *supportofthepintuinblers 21, and integral with said body is "a 'sleeve 2'8 within whlch'a master ring or Sleeve 29 is fitted to turn. This insert unitalso comprises a key plug 30 provided with a key "slot-and with tumblers in a manner common *to pin tumbler locks An insert retainer 3| in the -form of "a sliding bolt operated by a tongue 31-11 -'on the inner end of the sleeve 29 is adapted to enter a slot 32 -cut into the case-to receivesaid tongue. "The master ring or sleeve 29 may be rotated in a counterclockwise direction by themse 0f the proper "key to be presently described and the insert then removed from the lock body. The master ring or sleeve is provided with a stop pin 33 adapted to enter a groove 34 extending circumferentially in the plug 30; thereby permitting the plug to have a clock-wise movement by the use of a proper key to operate the bolt and release the shackle to unlock the lock.

The sleeve 28 of the insert unit is provided with a slot 35 in which a floating pin 36 carried by the master ring or sleeve 29 will enter when pushed out by the service or master key as shown in Fig. 11. This pin will block the counter-clockwise movement of the plug and the master ring or sleeve but will allow a clockwise movement of said sleeve and master key to effect operation of the lock to release the locking bolt. Prevention of counter-clockwise movement of the plug and master sleeve ensures no chance for operation by said members to release the insert unit, insertion of these keys operating against them for use for this purpose. The special or core key 31 has a notch 38 as shown in Fig. 13 to clear the floating pin 36 and thereby allow counter-clockwise movement of the master ring or sleeve to release the insert retainer and permit removal of the insert unit.

The lock comprises double locking bolts 39-4t which are adapted to enter locking notches in the short leg l4 and long leg I2 of the shackle which are adapted to move in opposite directions into said locking notches, tenons 4! on the end of the plug 38 each engaging a notch 42 in the bolt, as shown in Fig. 4 and springs 43 forcing the bolts into engagement with the long and short legs of the shackle.

The locking bolts 39 and 40 are each provided with a notch 4-2 into which two tenons 4: on the end of the plug enter and force the bolts in opposite directions to engage the notches in the short and long legs of the shackle, as shown in Fig. 4. The springs 43 operate upon the bolts for such locking action and the tenons force the bolts, by engagement with the notches in the shackles, to release the shackles and unlock the padlock.

It will now be seen that the key plug is operated as usual in locks of this type to lock and unlock the shackles and that a special key 31 is employed to operate the master ring or sleeve to release the unit and permit its removal.

A thimble 44 is forced into the lower end of the hole for the long leg of the shackle and the spring l upon which said leg is seated is enclosed within this thimble, as shown in Fig. 4. This thimble is retained in position by means of a peen 35 which projects into a groove 46 in said thimble.

The upper portion of the thimble 44 is slotted, as at 47, to slidably receive the pin I! in the long leg l2 of the shackle and align the end of the short leg l4 with the opening 13 and permit said shackle to be lowered, against the tension of the spring l5 into locked position, as shown in Fig. 4. It will be noted that the top of said thimble 34 is spaced below a stop shoulder 69 at the top of the recess 48 so as to provide the annular groove [6 therebetween which permits rotation of the shackle when in its raised position with the pin ll engaging the said shoulder 49.

The thimble 44 is secured against rotation in the recess 48 by means of a drive fit and retained therein against sliding movement by the peen 45. The slots 47 will prevent downward movement of the shackle except when the pin I! is in alignment with said slots and thereby facilitate locating of the shackle to a position where the short leg I4 is in ali nment with the hole I3 so that the lock may be easily operated, even in the dark, by simply rotating the shackle until it is felt that it is in proper position and then pushing it into locked position wherein it is engaged by the locking bolts 39 and 40.

The said locking bolts and the springs 43-43 are mounted in a supporting block 50, which is of a figure eight shape to conform with the shape of the recess 2 l, and the entire unit is retained in position at the top of said opening by means of a retaining spring 5| which snaps into notches 52 in side walls of said recess 2|. This construction permits the locking bolt unit to be first assembled and then simply inserted in the recess 2| and locked in position, by means of the spring 5|, whereupon the key operated lock unit 22 may be inserted into or removed from the casing independently of the locking bolts or looking bolt unit. The recess 2| has a side cut'53 at its upper end which extends through the Wall of said recess and communicates with the opening H so as to permit the entry of the locking bolt 40 into engagement With the notch in the long leg l2 of the shackle.

I claim:

1. A look of the character described comprising a body having an opening extending therethrough from the top of said body to the bottom thereof, the portion of said opening at the top of said body being of a lesser diameter than the portion at the bottom of the body and thereby providing a shoulder in said opening, a shackle having a long leg movable in said opening and a short leg adapted to extend into a separate opening in said body, a pin extending through said long leg and extending from the sides thereof to abut said shoulder and prevent removal of the shackle through the top of the body, a thimble secured against rotation in the larger portion of said opening and insertable thereinto from the bottom end of the body, a spring based within said thimble and pressing against the end of said long leg, the said thimble being shorter than the enlarged portion of said opening to provide a groove between the top of the thimble and said shoulder to receive the projecting ends of said pin therein and permit rotation of said shackle, and slots in the walls of said thimble adapted to receive the said projecting ends to align the short end of the shackle with its respective opening and permit downward movement of said shackle in said body for bringing the same into locking position.

2. In a lock of the character described, the combination of a body having an opening therein, a shackle leg movable in said opening and having projections 0n the opposite sides thereof, a recess larger than said opening communicating therewith and forming a shoulder in said body, a thimble shorter than said recess secured therein against rotation relatively to said body and having slots in the sides thereof to receive said projections to prevent rotation of the leg; the top of said thimble being spaced from said shoulder to provide an annular groove in said body for receiving said projections to permit rotation of the shackle.

3. In a lock of the character described, the combination of a body having an opening therein, a shackle movable in said opening, a recess communicating with said opening, a thimble secured within the recess and having slots in the wall thereof, a shoulder at the end of said recess, the top of said thimble being spaced from said shoulder to provide an annular groove between said thimble and opening, and a pin projecting from opposite sides of said shackle and adapted to slide Within said slots to permit only longitudinal movement of said shackle into locked and unlocked positions, the said groove permitting rotation of said shackle when in unlocked position.

4. In a lock comprising a casing having an inverted bottomed recess therein, a shackle slidable into said casing, a locking bolt unit positioned at the bottom of said recess and insertable therein as a unit and comprising a support having a locking bolt slidable therein for engaging said shackle, spring means below said unit for retaining it in position within said recess, and key operated mechanism insertable within said recess as a separate unit for operating said locking bolt and removable from said recess independently of the said locking bolt unit.

5. In a lock comprising a casing having an inverted bottomed recess therein, a shackle slidable into said casing, and a locking bolt mechanism insertable in said recess and located at the bottom thereof; said mechanism including a locking bolt slidable therein, means comprising a spring member insertable into and. co-operating with notches in the wall of said recess for retaining said mechanism in operative position therein, and a key operated locking unit insertable within said recess for operating said looking bolt and removable from said recess independently of the locking bolt unit.

6. In a lock including a shell having an inverted bottomed recess therein, the combination of a shackle member slidable into said recess, a

locking bolt unit including a supporting block containing a locking bolt slidable therein and engageable with said shackle member, the said block being insertable into said recess, means following said block and engageable with notches in the walls of said recess for retaining the said locking bolt unit in operative position at the bottom of said recess, a detachable core containing a locking mechanism insertable within said recess following said retaining means, key operated means in said locking mechanism for engaging and operating the locking bolt, means engageable with the wall of the recess for securing said core within the said opening, and means for controlling said key operated means independently of the locking bolt for releasing the said core to permit removal thereof from said opening.

LOUIS M. DYSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,561,771 Best NOV. 17, 1925 1,564,462 Best Dec. 8, 1925 1,580,574 Segal Apr. 13, 1926 1,779,716 Shaw Oct. 28, 1930 1,947,443 Bargman Feb. 20, 1934 2,281,088 Nelson Apr. 28, 1942 2,347,802 Voight May 2, 1944 FOREIGN PATENTS Number Country Date 752,937 France July 31, 1933 

